Vientiane Prov., Vang Vieng Distr., Phoudindeng village, 1-2 5 km to the E of Vang Vieng town around point 18°57’48.7”N 102°27’34.0”E. Dry broad-leaved secondary evergreen forest with bamboo on low hills composed by shale at elevation about 400 m. Shrub to 2 m tall in rather open slope among secondary scrub. Flowers white. Not rare.